package cn.eastseven.demo.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.DelimiterBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

import java.nio.charset.Charset;

public class EchoClient {

	public static void main(String[] args) throws Exception {
		
		EventLoopGroup group = new NioEventLoopGroup();
		
		try {
			
			Bootstrap b = new Bootstrap();
			b.group(group);
			b.channel(NioSocketChannel.class);
			b.handler(new ChannelInitializer<SocketChannel>() {
				@Override
				protected void initChannel(SocketChannel ch) throws Exception {
					ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());
					ch.pipeline().addLast(new DelimiterBasedFrameDecoder(1024, delimiter));
					ch.pipeline().addLast(new StringDecoder(Charset.forName("UTF-8")));
					
					ch.pipeline().addLast(new EchoClientHandler());
				}
			});
			
			ChannelFuture f = b.connect("127.0.0.1", 9527);
			f.channel().closeFuture().sync();
		} finally {
			group.shutdownGracefully();
		}
		
	}

}
